Seismic Design
Seismic design aims to ensure structures can withstand earthquake forces. Key concepts include ductility, energy dissipation, and capacity design. The response spectrum represents the maximum response of structures to ground motion. Seismic design categories (SDC) are based on risk. Special detailing requirements (ACI 318 Chapter 18) apply to structures in seismic zones. Capacity design ensures that ductile elements yield before brittle elements fail.
Knowledge Check
1.In seismic design, the response modification factor (R) accounts for:
2.What is the importance factor (I) in seismic design?
3.A building with a seismic base shear V = 500 kN has a total weight W = 5,000 kN. What is the seismic response coefficient (Cs)?
4.What is the purpose of special detailing in seismic-resistant concrete structures?
5.In seismic design, the term 'strong column - weak beam' refers to:
6.What is the minimum seismic design category (SDC) for buildings in areas with high seismic risk?
7.The response spectrum is used to determine:
8.What is the recommended ductility demand for special moment frames in seismic design?
9.In capacity design, the overstrength factor accounts for:
10.What is the purpose of using closely spaced ties (stirrups) in columns in seismic zones?